We put forward three core propositions.First, the influence of capital regulation and supervision on the behaviour of the financial system and on the characteristics of the business cycle has arguably been increasing. This in part reflects the higher risk-sensitivity of the minimum capital threshold and the more pervasive impact of the corresponding framework on how financial firms measure, manage and price risks. Together, these factors suggest that the role of prudential constraints in the transmission mechanism of monetary policy may be growing.Second, more generally, insufficient attention appears to have been paid so far in the transmission mechanism to the link between monetary policy and the perception and pricing of risk by economic agents – what might be termed the “risk-taking channel”. Both directly and indirectly, changes in interest rates and the characteristics of the central bank’s reaction function can influence risk-taking, by impinging on perceptions of risks and risk tolerance. We will argue that it is in the context of the risk-taking channel that notions of “liquidity”, best thought of as the ease with which perceptions of value can be turned into purchasing power, acquire added significance. The self-reinforcing link between liquidity and risk-taking could potentially have a material effect on the strength of the transmission of monetary policy impulses, akin to a “multiplier” effect. In turn, the importance of measures of risk and valuation points to the relevance of accounting practices in shaping the transmission. To be sure, our point is not, and cannot be, that the risk-taking channel is the most important channel of monetary policy; far from it. It is simply that its exploration would give us a fuller understanding of the transmission mechanism, especially as its prominence is likely to have increased in the wake of financial liberalisation and innovation and of changes in prudential frameworks.Finally, against this background, significant aspects of the overall shape of the transmission mechanism can potentially be missed if one does not endogenise the reaction function of the central bank within a general equilibrium framework. The argument is that there is an
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